* {
	margin: 0;
	padding: 0;
}

.header {
	width: 100%;
	height: 40px;
	background-color: black;
}

.header .centerbox {
	width: 1000px;
	height: 100%;
	background-color: aliceblue;
	margin: auto;
}

.header .centerbox .leftbox {
	width: 700px;
	height: 100%;
	background-color: aquamarine;
	float: left;
}

.header .centerbox .rhbox {
	width: 200px;
	height: 100%;
	background-color: azure;
	float: right;

}

.bigbox {
	width: 1000px;
	height: 60px;
	background-color: rosybrown;
	margin:15px auto;
}

/* 复合选择器 */
.bigbox .leftbox {
	width: 80px;
	height: 100%;
	background-color: chartreuse;
	float: left;
}

.bigbox .textbox {
	width: 600px;
	height: 100%;
	background-color: aquamarine;
	margin: auto;
}

.bigbox .inputbox {
	width: 100px;
	height: 100%;
	background-color: bisque;
	float: right;
	margin-top: -60px;
}
.adbox{
	width: 1000px;
	height: 600px;
	background-color: beige;
	margin: auto;
}
.adbox .libox{
	width: 20%;
	height: 100%;
	background-color: aquamarine;
	float: left;
}
.adbox .tubox{
	width: 80%;
	height: 100%;
	background-color: azure;
	float: right;
}
.fourbox{
	width: 1000px;
	height: 200px;
	margin: 15px auto;
	background-color: peachpuff;
}
.fourbox .box{
	width: 227px;
	height: 100%;
	background-color: salmon;
	float: left;
	margin-right: 30px;
}
.fourbox .rbox{
	margin-right: 0;
}
.mainbox{
	width: 100%;
	height: 1000px;
	background-color: gainsboro;
	/* 解决塌陷问题 */
	overflow: hidden;
}
.mainbox .ljbox{
	display: block;
	width: 1000px;
	height: 80px;
	background-color: goldenrod;
	margin: 15px auto;
}
.showbox{
	width: 1000px;
	height: 600px;
	background-color: antiquewhite;
	margin: auto;
}
.showbox .text{
	width: 100%;
	height: 10%;
	background-color: azure;
}
.showbox .tubox{
	width: 100%;
	height: 90%;
	background-color: aquamarine;
}
.showbox .tubox .hbox{
	display: block;
	width: 20%;
	height: 100%;
	background-color: lightcoral;
	float: left;
}
.showbox .tubox .fbox{
	width: 80%;
	height: 100%;
	background-color: blanchedalmond;
	float: right;
}
.tubox .fbox .topbox,.bottombox{
	width: 100%;
	height: 48%;
	background-color: pink;
}
.tubox .fbox .topbox{
	margin-bottom: 21px;
}
.tubox .fbox .box{
	display: block;
	width: 180px;
	height: 100%;
	background-color: skyblue;
	float: right;
	margin-left: 20px;
}